About this item Non-isolated step-down constant current, constant voltage (CC CV) charging module. Input voltage: 7-35V; Output Voltage: 1.25-30V. Output current: rated current 2A, maximum 3A (need to add heat sink); if the output power exceeds 15W, a combined heat sink is recommended. Rectification: non-synchronous Rectification. Application: Charger for all batteries in the range 1.23V ~ 28V; simply set the precise battery voltage and charging current. High conversion when used in cars, adjustable laboratory voltage source, LED driver with constant current, dimming devices, and laboratory power supply. Size: 4.57 x 3.7 x 1.22 inches.